Warning: my friend had difficulty when she tried to use a Visa debit card to rent a phone. They insisted it had to be an actual credit card. Not sure if this a real thing or just something the staffer insisted upon that day.

So, all of these Ohello and T-Wifi hotspots I see, they have nothing to do with SIM cards or phone contracts... right? They are independent WiFi providers and you can have a contract with them regardless of whether or not you have a smartphone or a WiFi tablet?